Accession Number:

ADA248942

Title:

The Interplanetary Heavy Ion Environment for Both Galactic Cosmic Rays and Solar Energetic Particles during the CRRES Mission

Descriptive Note:

Scientific rept.

Corporate Author:

LOUISIANA STATE UNIV BATON ROUGE

Personal Author(s):

Report Date:

1991-10-18

Pagination or Media Count:

90.0

Abstract:

A calculational model of the Interplanetary Heavy Ion Environment is being developed for the CRRES mission to include both galactic cosmic rays GCR and solar energetic particles SEP. Data from the ONR-604 experiment on CRRES plus results from other experimentsspacecraft are being combined to evaluate the heavy ion radiation environment in near-Earth space in the 1990-1991 epoch. The modeling effort is described along with operation and performance of the ONR-604 experiment, including prelaunch accelerator calibrations and on-orbit response. The status of the data systems development for this effort is summarized, along with its use for the initial analysis of the data and the modeling effort. The preliminary working environment for the period 9190-228 91 is characterized by a high level of solar modulation and correspondingly low flux of GCR and no significant component from SEPs. Both particle flux and LET spectra have been calculated. The limitations and uncertainties inherent in this working model are presented, along with the effort to be undertaken to understand and reduce the uncertainties.

Subject Categories:

  • Astrophysics
  • Unmanned Spacecraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE